The synopsis reads: "A database breach at FBI headquarters allows an unknown group to access and capitalize on those investigations left unsolved by the secret department once known as The X-Files.

"As friends and foes of the agency long-thought gone begin to inexplicably reappear, former agents Mulder and Scully come out of anonymity to tackle a growing conspiracy involving their former department, the US government and forces not of this world."

Cold Cases will have "creative direction" from X-Files creator Chris Carter, with the adaptation written by Dirk Maggs (The Hitchhikers Guide to the Galaxy).